Disclosure forms ask precise questions about things sellers often genuinely do not know. When did the roof last get worked on? Has the basement ever taken water? Faced with a blank field and a deadline, people guess, and a guess recorded as a statement of fact is the worst of both worlds.
"I do not know" is a legitimate answer
It is also frequently the honest one, particularly for work done by a previous owner. The problem is that most forms provide no comfortable way to say it, so uncertainty gets flattened into a yes or a no. Both carry risk the seller may not intend to take on.
An uncertain answer that is clearly marked as uncertain protects the seller and informs the buyer. A guess protects nobody.
Answer from the record, not from memory
Disclosure gets substantially easier when the underlying facts already exist. If service history, receipts, and photos were captured as the work happened, most questions become lookups rather than recollections.
That is the case for documenting continuously rather than at listing time. The form is not the work; it is a report on work that should already be written down.
Nothing here is legal advice. Disclosure obligations vary by state and transaction, so confirm specifics with your agent or an attorney.