i cannot add to trusted certificates, please help
Please, describe in detail what you are doing. Include Acrobat version (with minor), platform. OS. It is impossible to help you if we do not know what you are doing.
I am using ADOBE ACROBAT READER it does not say which one it is (8, 9, 10
I am using a toshiba laptop, how do I find out which operating system it is
basically I cannot put in a tax return as it refuses the trust certificate.
A am sorry but we do need details...
"I am using ADOBE ACROBAT READER it does not say which one it is (8, 9, 10 etc)."
Go to Help > About Acrobat Reader. It will give you the exact version number, such as 11.7.4 or 2015.123.00344
"how do I find out which operating system it is using?"
You should know this. The answer may be Windows XP, Windows Vista, Windows 7, Windows 8 or Windows 10.
"basically I cannot put in a tax return as it refuses the trust certificate."
What EXACT message do you get? Which tax return - please give a link (we don't even know what country's tax return you are working on...)
+ do you try to sign in a browser or standalone Reader? You must be using Reader version 11.0.07 or later because before 11.0.07 you could not sign in Reader, only in Acrobat.
+ How do you try to sign: do you click on an unsigned signature field, or do you start signing using "Sign" dialog?
+ What do you mean by "refuses the trust certificate"? Do you get an alert? If so, include a screenshot.
+ Provide as many details as possible.