Do I mail in my paper tax return even without an official extension acceptance notification? Sent tax payment with extension 4868. Check cleared. Not sure what to do next

Taxes were completed in Turbotax back in April. Couldn't complete the e-file, so in a panic I paper mailed the extension form along with a check for the taxes. Check was cashed, but no other acknowledgement of acceptance was sent back to me. The finished tax return from April is still here on my computer, but not sure what to do next. E-file won't be an option. Should I just paper mail it in and hope for the best?