Offer your thoughts or opinion on the input financial query or topic using your financial background.

After consulting HR Block, are you actually obligated to file your taxes with them, if they've found ways to save you money?
The obligation is contractual, so you need to read the contract to answer your question. However, since you paid for the service provided, I see no way they can force you buy any other service from them. They cannot file your tax returns without your explicit consent (on a form dedicated to that, dated and having the numbers matching the return filed - not something you can sign before the actual return is ready). Worst case they can claim you owe them more money, but since you paid for the services provided, I can't see how they can have that stand in court as well. Bottom line - even if the contract has such an obligation, I cannot see how it can be enforced. As to the mistake they noted... I wouldn't rely on H&R Block advice in any matter. Very likely, the person you were talking to was not even licensed to provide tax advice. You're lucky if the person has passed CRTP exams (in California they're legally required), but I seriously doubt their clerks are EAs or CPAs (the only designations other than a lawyer legally allowed to provide tax advice). Tax preparers (CRTPs included) are only allowed to provide advice pertaining to the preparation of the tax return they're currently engaged to prepare. Claiming income is sourced or not sourced in NY is borderline, IMHO. If they got it wrong (and to me it sounds as they did) you can sue them for damages. If your situation is tricky and it is too late to get an appointment with a proper adviser - file an extension (form 4868) and deal with it after the April busy season.