I don't remember for sure, but I think I had to trim down my AMCAS version a bit for the TMDSAS. Will they let you set up an account for next year right now? If so, you can just log on and it will tell you. good luck.
The website says you get 62 lines. They don't say exactly how that's measured (like chars per line). The you can get your app started on may 1st I guess and find out then. Would someone PM me if they find out about how many characters this ends up being?