Which is the best online insurance broker in Australia

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.

Does a nonprofit (not for profit) organization need to have an independent review and/or audit of its financial statements?

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.

What are the advantages of factoring?
Factoring allows your company to get instant cash, in less than 24 hours. Factoring can be defined as a process when a third party firm, known as a factor, purchases the accounts receivable of a business and gives it cash advance based on those bills (that are unpaid). It has a number of benefits like:
1. Does not require collateral
2. Good use for growth
3. Qualify for more and more funding
Do you agree with this? Are there any more benefits?

Can I claim child tax credit for my son born on December 31?

I am a Nonresident Alien and I live in Ensenada Baja California Mexico. I’m about to buy many electronics. Total value would be around $12,000 for my personal use. I am building my own house and I want to buy from SEARS in Chula Vista, California, but I don’t want to pay double tax (in the US and Mexico) since I am going to import the merchandise to Mexico. Is there any way to avoid the payment of taxes in Chula Vista?

What exactly is accounts receivable financing and factoring and how can it help a business?