See a tax attorney or a tax CPA before doing this. He or she may help you find out what the IRS knows about your income for the past years.
As for estimating expenses, you are allowed to do it so long as you have a reasonable basis for making the estimates. However, expect the IRS to challenge your estimates if they audit you. Again, see a tax professional to better understand how to do this.
Best of luck.
You are required to file by law, so file your best estimates. There can be significant civil tax liabilities assessed against, but probably not criminal charges unless you are concealing significant income. The IRS will prepare it own return (SFR = substitute for return), as will the State of California.
Phillip M. Smith Jr.
Los Angeles Tax & Business Attorney
Licensed in the United States Tax Court
Main: 323-292-4116 ❘ Cell: 562-505-1004
THESE COMMENTS ARE NOT LEGAL ADVICE. They are provided for informational purposes only. Actual legal advice can only be provided after consultation by an attorney licensed in your jurisdiction. The answer to question does not create an attorney-client relationship or otherwise require further consultation. Mr. Smith is licensed to practice law throughout the state of California with offices in Los Angeles County. He is authorized to handle IRS matters throughout the United States, and is also licensed to practice before the United States Tax Court. His phone number is 323-292-4116 or his email address is firstname.lastname@example.org.
I agree with Attorneys Chung and Smith. If you were not at fault then you should be better off than if you were just negligence. It sort of depends also on how big the numbers are. If you are at fault then keep on searching for the best evidence.
Disclaimer of California Attorney. Laws differ from state to state. Although the above response is believed to be accurate, it should not be relied upon as any type of legal advice because the information provided is incomplete. It is intended to educate the reader and a more definite answer should be based on a consultation with a lawyer. No attorney client relation is formed with me without a written contract. Good Luck starts with a strategy and a plan. Robert J. Suhajda, MS,CPA Attorney-At-Law 17721 Norwalk Blvd. #43 Artesia, CA 90701 562-924-8922 Tax Relief Lawyer. Former financial auditor and controller. Admitted to US Tax Court, Income Tax, IRS representation, Fiduciary income tax returns, Estate and Gift tax returns, Homeowner Association Strategist.