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Sales Tax Reporting for Dynamics 365 Business Central

Taxable and exempt sales by jurisdiction, read from Business Central’s invoices for the period, with every exempt sale checked against the certificates on file and the return workpaper laid out the way the state asks. A person reviews it and files.

Finance & reportingUpdated Oct 202620 ERPs

See it work on Business Central.

Click through the steps. Fictional data, in Business Central’s terms; the real thing runs on Business Central.

September · by jurisdiction
Illustrative
JurisdictionGross salesExemptTaxableTax collected
State · 6.25%$2,418,700$1,612,400$806,300$50,393.75
Mercer County · 0.75%$1,604,200$1,081,600$522,600$3,919.50
Linden County · 0.50%$814,500$530,800$283,700$1,418.50
City of Ashford · 1.00%$412,900$290,100$122,800$1,228.00
Invoices Sep 1 to 30. Each figure opens its invoices.

Gross, exempt, taxable and tax collected, read from Business Central’s invoices for the period.

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The problem, as it happens in Business Central.

The sales tax return starts with Business Central’s tax report by jurisdiction, which is right for the taxable sales and silent on the rest. The exempt sales are the problem: the contractor on a resale certificate, the church, the job in the next county at a different rate, the delivery to a jobsite that Business Central taxed at the branch. The controller exports it, sorts by customer, and checks the certificate drawer.

What nobody tracks is the gap: exempt sales to customers whose certificate expired two years ago, or was never collected because the counter said they were exempt. An audit finds those, with interest, three years later. The return gets filed on time and the risk sits in the drawer.

How it works.

  1. 1

    The period’s invoices are read

    Every invoice and credit in Business Central for the period, with the jurisdiction, the tax charged, the exemption reason, the ship-to, and the customer. Freight and delivery lines are kept apart, since states treat them differently.

  2. 2

    Exempt sales are checked against certificates

    Each exempt invoice is placed against the certificate on file for that customer, from the tax exemption workflow or your own folder: present, expired, missing, or the wrong kind for that sale.

  3. 3

    The workpaper is laid out

    Gross sales, exempt sales by reason, taxable sales, tax collected, by jurisdiction, in the order the state’s form asks. Each figure opens the invoices behind it. Differences from Business Central’s own tax report are listed, with why.

  4. 4

    A person reviews and files

    The controller reads the workpaper, chases the missing certificates or decides to accrue the tax, and files the return. The workpaper and the invoice list are kept for the period, for the auditor.

How it connects to Business Central.

Lunica reads Business Central’s invoice history, tax codes and jurisdictions, the customer card with its exempt flag and certificate fields, and ship-to addresses through Business Central’s API, under a user that can only read. Certificates on file come from the tax exemption workflow or the folder you point it at.

Nothing is written to Business Central by Lunica and nothing is filed on its own. The return is filed by a person. A customer whose certificate is missing or expired is set to taxable, if you choose, keyed by your team on the customer card in Business Central. Any tax to accrue is an entry a person posts.

What a week looks like.

  • The workpaper is ready the morning after the period ends.
  • Every exempt sale has a certificate behind it, or a name on the list of who doesn’t.
  • Jurisdiction is the ship-to, not the branch, where the state says so.
  • The auditor gets the invoice list behind every line, from the period it was filed.

Questions

Does it file the return?

No. It lays out the workpaper and the invoice list behind it. A person files, on the state’s site or through whoever files for you.

Does it change tax on invoices in Business Central?

No. If a sale should have been taxed, the workpaper says so and the controller decides whether to accrue the tax or bill it. Changes to a customer card are keyed by your team.

How does it know the jurisdiction?

From Business Central’s tax code on the invoice first, and from the ship-to address where the sale was delivered. A delivered sale taxed at the branch rate in a destination state is flagged.

What about certificates we already have on paper?

Point it at the folder. Each certificate is read for the customer, the type, the state and the expiry, and placed against that customer’s exempt sales.

What if we file in more than one state?

Each state gets its own workpaper, in that state’s order, from the same read. Nexus itself is a question for your accountant; the workpaper shows sales by state so the question has numbers.

Is this tax advice?

No. It is your invoices, your certificates and your tax codes laid out the way the return asks. The decisions are the controller’s and the accountant’s.

Does it need a server?

Lunica runs on one server inside your network, whether Business Central is in Microsoft’s cloud or on your own server, set up and maintained by Lunica. It reads Dynamics 365 Business Central through Business Central’s API, under a user that can only read. There is no inbound connection from outside your network.

What does Lunica read in Business Central?

The customer card, open items and terms, purchase orders and receipts, the item card, quotes and order history, as each workflow needs them. Read-only, and only the rows a task is about.

Can it post to Business Central?

Nothing lands in Business Central without a person. What belongs in Business Central goes back as a Business Central API call or import where one exists, or keyed by your team from what Lunica prepared.

What about our documents?

Invoice copies and scans keep living in the attachments on the record. Lunica reads them when a workflow needs one and never writes to them.

The same workflow, on another ERP.

Sales Tax Reporting is written for every system on the list. You’re reading the Business Central version.

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