lol it ask for clan tag, I'm not in clan where is clan tag?

all i get is this and wont let type anything, i give up this stuff over my head

ERROR!

Incorrect verification code in clan tag

HOME 

CLAIM PLAYER

CLAIM PLAYER

To verify this account as yours please enter the following as your battlefield 4 soldiers clan tag here:

1qj3

After you have completed this please press the claim button below to link accounts, you may change your tag back after this is done.

5 second search on google to know how to change a tag.

told you im 55 years old im not into all this stuff or how it works.

I don't think age has anything to do with the lack of ability to follow basic instructions.  It is literally 3 clicks to get to place to change it.