Hi Mav.
Unless I'm missing something here, your question was "What percent of your expenses can you expect to get back?"
The short answer is that no one here knows, and can only give you a rough formula.
The reason is that, we don't know your current salary or withholding basis. In order to calculate your refund, the basic formula would be to subtract your business/personal expenses and dependents deductions from your gross income. That would give you the net income, from which you'd need to go by the tax table for NY state to determine how much tax you "owe." If you *paid* more taxes than you should have, you'll get your refund.
Business expenses are not a *tax credit,* meaning you won't get money back that you didn't spend in the first place. (some tax credits are the EIC and the Rent credit in New York State.)
* http://www.irs.gov/irs/news/0,,i1%3D42%26articleId%3D26744,00.html
This is the link for new tax policies in place for those affected by Sept. 11 tragedy, there may be some resources there you don't know about.
* http://www.irs.gov/newsroom/display/0,,i1%3D42%26genericId%3D21022,00.html
You may be entitled to some special assistance in this regard, follow the above links. The IRS has set up a toll free number specifically for people affected by Sept 11, and I'm sure you qualify.
You could always call the IRS at 1-800-829-1040. Call 1st thing in the AM.
I've processed tax returns part time for about 8 years for HR Block and Jackson Hewitt, but not in the past three years so I hope this helps.
Lisa
Fuzzy Brain Class