You can definitely leave a link to it! But if it wasn't written specifically for the prompt then I don't consider it a fill, exactly.
(plus, some people might be prompting something because they've read something similar and want more, so a link to an already existing fic might not be what they're looking for.)
I mean, you should absolutely reply with a link if it fits the prompt! There's every chance that the prompt poster hasn't seen it, and would be delighted to read it.
Re: Already filled
(plus, some people might be prompting something because they've read something similar and want more, so a link to an already existing fic might not be what they're looking for.)
Re: Already filled
(Anonymous) 2015-05-26 08:05 pm (UTC)(link)Re: Already filled
Re: Already filled
(Anonymous) 2015-05-26 09:38 pm (UTC)(link)