Can I file an amendment to correct my self employed income after receiving irs form CP05? Or do I now have to wait the 45 days until the IRS contacts me before I amend?

I am self employed and received an IRS form CP05 which tells me to do nothing. However, I noticed an error on the income and one of the deductions I reported. Can I file an amended return to make a correction Now or do I now have to wait the 45 days until the IRS contacts me?