can I upload the TPAR to the ATO

Yes, you can upload the TPAR to the ATO, yrussell4.  

You can submit your Taxable Payments Annual Report (TPAR) to the ATO using one of their digital lodgment options: manual entry or file transfer. With manual entry, you input contractor details and payment information directly into the online form. For file transfer instructions, refer to this article for a detailed guide: Creating your Taxable Payments Annual Report (TPAR).

To learn more about the process of lodging TPAR to the ATO, I suggest referring to this article for detailed guidance: Lodge your TPAR.

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