2023 tax returns - not yet

I am set to close on a business by the end of April. Sellers do not have the 2023 tax returns yet (said they are going to be extended). The bank does not yet have their 2023 returns done yet.

Would anyone here be concerned with not having the 2023 returns yet? My accountant has reviewed bank statements and done a mini-QOE, but I'm a bit concerned that something could be misrepresented if taxes have not yet been reported.