I am doing freelancing for two different companies and I have several questions. I deliver for them digital files, such as research, PowerPoints or excel files. Do I need to add sales tax to the invoices? When and how do I file taxes? I have never worked before in California and just started working in October last year.

If I'm participating in my employer's 401K plan, may I also set up a SEP-IRA for my self-employment income?

What is the best way to save credit card surcharges?

Is commission rebate from the buyer's Realtor to the buyer a taxable income? Transaction was done outside of the escrow and 1099-Misc (Box 7) was issued to the buyer following January. 1) is this taxable income for the buyer and 2) if so, is he responsible for SE taxes as well?

If I participate in my employer's 401K plan, can I also set up a SEP-IRA for my self-employment income?

Is a credit card statement considered a viable replacement of a receipt for income tax documentation of expenses or are credit card slips still required?

What is the best way to become a financial advisor?

What are the best ways of spending money apart from spending just on shopping and entertainment? When can spent money be never regretted? Add your feedback please.