Pan not available for filing etds return

kindly check that whther your client had earlier deducted any tax amount in prev year from same vendor.

Kindly check for prev form 16 issued by the vendor to client or vice versa or prev year 26 as statement available.

Its vendors problem , it cant get tax credit.

Just show the other invoice in the different name(lets say from the group of company/firm ) and claim the TDS in that person/firm's name. By this way, the expenditure will be claimed and the Tax Credit will also be available to the preson.