i forgot my apple id and my ipad is on activation lock how can i fix it?

Hey there! Sorry for the troubles, if you haven’t seen them yet, maybe these articles can help:

Activation Lock (Explanation):

https://support.apple.com/en-us/HT201365

Remove Activation Lock:

https://support.apple.com/en-us/HT201441

However it’ll be difficult to remove Activation Lock without knowing the Apple ID linked to it, this article might help:

Find Your Apple ID:

https://support.apple.com/en-us/HT201354

If all else fails, if you can provide Apple a copy of the receipt, or documentation proving you are the purchaser of the device, and they can validate it, they may be able to remove it on their end:

https://support.apple.com/en-us/HT201232

Hope that helps, and it works out okay!