You would need to override anything to comply with 2022 tax law (which may change over the next 6 months), print the return, cross out "2021" and write "2022", and file by mail.  If tax law changes in the next 6 months and it would affect the tax return, you may need to amend it later.

Due to the extra work and hassle, you would need to charge the client a larger fee.

It would probably be better to file an extension and e-file in January or February.