You are not a tax return preparer if you are  "A person who prepares a return or claim for refund for a taxpayer with no explicit or implicit agreement for compensation, even if the person receives an insubstantial gift, return service, or favor."

26 CFR § 301.7701-15 - Tax return preparer.

https://www.law.cornell.edu/cfr/text/26/301.7701-15#:~:text=A%20tax%20return%20preparer%20is,1)%20Si...

But I sign those returns anyway.