The contribution room I don't care about. Mine is so high right now from years and years of underfunding my RRSP that I'll never max out.
The yearly bonus is paid in the next year. So the 2008 bonus was paid in 2009. (The bonus from 2007 was paid in 2008 and is included in my income T4 as it was paid to me and income taxes taken off. I'm not asking about that bonus.) A large chunk of the 2008 bonus was paid ahead of the end of February 2009 while the smaller chunk was paid in March 2009. That smaller chunk I know can't be used at all for filing taxes for 2008. The large chunk could be used for filing taxes for 2008 if I choose depending on what the rules say about pre-tax contributions. However that money was directly put into an RRSP before taxes were taken off (other than CPP and EI.) I also had post-tax contributions too.
So for example:
Post-tax contributions: $2,000
Pre-tax bonus contribution: $10,000
So when filing for 2008, do I say that I've put in $12,000 to my RRSP and thus get a big fat refund or can I only say that I put in $2000 since the $10,000 was pre-tax and so I get a much smaller refund?