I have an old iPad that used to belong to my daughter, I have no details to unlock it

I have my daughter's old I pad, and she no longer uses it, but it is unusable because she no longer remembers the password. It is years old and I do not have any purchase details as the company has gone out of business, although I was with her when it was purchased. How can you help me? I have no idea of its details although I have it connected to my computer