> ## Documentation Index
> Fetch the complete documentation index at: https://www.aiaccountant.com/help/llms.txt
> Use this file to discover all available pages before exploring further.
# Upload and map your purchase register
> Upload your books as Excel or CSV, review the column mapping for each file, and import.
The purchase register is your side of the reconciliation: what your books say you bought.
## Upload the files
In the **Purchase Register** section, click **Upload Purchase Registers** and add your files.
* Excel and CSV are both supported.
* You can upload more than one file at a time, for example a separate file each for regular purchases, journal register, credit notes, and debit notes.
## Map the columns
A **Map Your Columns** window opens for each file, so the system knows how to read your sheet. AI Accountant maps the columns automatically. Review them before saving.
| Setting | What to set |
| ------------ | ------------------------------------------------------------------------- |
| Header Row | The row your column headings sit on. |
| Voucher Type | Regular, Credit Note, or Debit Note, depending on what the file contains. |
Then check that each field points at the right column in your file: GSTIN, Vendor Name, Invoice Number, Invoice Date, Voucher Date, Invoice Amount, Place of Supply, Rate, Taxable Amount, individual GST, and Remarks. Confirm the date format matches as well.
Rows with zero tax value are excluded from reconciliation automatically, so you do not need to clean those out yourself.
Click **Save Mapping**, and repeat the review for each file.
## Import and run
When all files are mapped, an **Upload Summary** lists each one marked Ready. Click **Import Files**.
With portal data on one side and your purchase register on the other, click **Run Reconciliation**. Results appear in a few seconds.
Understand what each match status means for your credit.