File the return as the law allows, by paper. Don’t owe any tax? No problem. If you do, and you pay— can assure you your check will be handled.
NOT going to be forced into the entirely unstable electronic security of e-filing. Period.
Keep a notarized copy with mailing date stamp. And mail it by USPS. Legally binding.
Have you had a bad experience with efiling? Mine always go through and I get aconfirmation in about six hours using Turbo Tax.