Where to file?
California addresses for Form 1040, 1040-SR, 1040ES, 1040V, amended returns, and extensions
Where's my refund?
Find out if the IRS received your tax return and check the status of your refund
Checking your withholding can help protect against having too little tax withheld and facing an unexpected tax bill or penalty at tax time next year.
Pay your taxes, view your account or apply for a payment plan with the IRS. ... IRS