I've used Foxit Phantom for about 15 years to create pdf's. It can also create new, or existing fillable forms. It's fairly easy if there is an existing form, but if you start from scratch it can take up a lot of time.
It has a loto of other features, not quite as much as Adobe, but it has served me well over the years.
Kofax Power PDF may work for you. They are now Tungstenautomation they still have a free trial. Here is an old post with some details from a prior year.
https://www.atxcommunity.com/topic/30243-atx-questionnaire-users/#comment-196790
It's amazing what some tax pros try to get away with. I had an a CPA, more than 30 years ago who was an ex IRS Criminal Investigator.
He though he knew what he could get away with. He and his assistant, also a CPA, inflated expenses on clients business returns. One of the clients got audited and it led to the IRS looking at other returns that had been prepared by them. It ended up with hefty jail sentences and fines.