The month is closed — your return is ready
Invoices, bank and expenses are already in the system. The iStartPay tax engine closes the period; it computes VAT, withholding, provisional tax and Ba/Bs as a draft — you approve, and only then does it reach GİB.
The whole filing chain of tax — tied to the system, not a ledger book
It shares data with the core modules: sales invoices flow into output VAT, purchases into deductible VAT, bank expenses into the tax base by themselves — no separate tax math, no double entry.
VAT Return (KDV-1)
From the period sales and purchase invoices, the base, output VAT, deductible VAT and carryover VAT are computed automatically; the payable VAT arrives ready as a draft.
Withholding & Provisional Tax
Withholding return from stoppage records; quarterly provisional tax with the GVK Art.103 cumulative brackets — base excluding VAT, to the last kuruş.
Ba/Bs Form — Automatic
Counterparties over ₺5,000 a month are detected from the invoices themselves; the Ba (purchases) and Bs (sales) lists are prepared with name, tax number and amount.
Depreciation & Fixed Assets
Annual depreciation by straight-line or declining balance; accumulated depreciation and book value update automatically — double posting is prevented.
Draft → Approve → Send
Every return is born a draft; it never reaches GİB until you press "Approve & Send". The sent period is locked — who approved and when is on record.
Multi-format Export
Excel summary, GİB BDP XML, XBRL e-Ledger journal and A4 PDF — return, Ba/Bs, depreciation and period report all download from one screen.
The period closed — your return draft is already there
The invoices issued through the month, bank movements and expenses are already in the system. Close the period; the iStartPay tax engine computes the VAT, withholding and provisional tax and puts the draft up for your approval.
No math, no forms to fill — close, review, approve
Set up, run, close
Invoices, bank and expenses already flow — no setup.
- Sales → output VAT
- Purchases → deductible VAT
- Bank expense → tax base
Close the period, let the engine total it up.
- VAT carryover + payable
- Withholding from stoppage
- Provisional tax cumulative
Go over the draft, see the line items.
- Base excluding VAT
- Ba/Bs over ₺5,000
- Line by line, transparent
"Approve & Send" — the period locks.
- Draft → sent
- Who/when on record
- You send to GİB
Download Excel · GİB XML · e-Ledger · PDF.
- GİB BDP XML
- XBRL e-Ledger
- A4 PDF + Excel
Filing night is over — the numbers arrive ready.
14 days free — no card required.
Pick a plan that includes this module on the pricing page and start right away.