If you have tried all nine methods and error number RT3BAS1059 persists, the repack itself is fundamentally broken. Your options:

The GSTN interface processes complex accounting calculations in the background. Double-clicking action buttons out of impatience can break the submission loop and force an error string.

I can provide target troubleshooting instructions for those issues. Share public link

Click on the button. A pop-up verification box will appear asking for confirmation to offset your credit/cash balances against your liabilities. Select "Yes" .

Are you seeing this error during the or at the final verification stage? AI responses may include mistakes. Learn more

: If the error persists after clearing cache, it may be a server-side "bottleneck." Wait 30 minutes and try submitting again. or instructions on using the GST Offline Tool to bypass portal errors?

: If you are at the final filing stage (EVC), ensure your OTP hasn't expired (they usually last 10 minutes Update DSC : If using a Digital Signature Certificate, ensure your is active and you are using the correct port (often myBillBook

If you have 8GB or less of RAM, high-compression repacks can fail.

: Ensure that the "Set-off" button has been clicked and that the figures for "Paid through ITC" and "Paid in Cash" correctly equal the total liability. Check Draft Summary