Assuming your statement is accurate, then it sounds like you will use the standard deduction next year (married filing jointly?) and you won't need receipts.
However (and this comment is a product of my personal history plus caution and cynicism) if something happens in 2018 and you ended up needing to file as single or as married filing separately, the standard deduction will be $12,000 and you will still benefit from those itemized deductions. So you might not want to entirely abandon your receipts.
And of course, there are other things that could bump you over $24,000 such as sudden massive medical expenses.
Although note: the miscellaneous itemized deduction for work expenses is eliminated completely even if you itemize, so those receipts aren't needed either way. The main deductions in 2018 will be mortgage, property taxes and state and local taxes, medical expenses, and charitable contributions.
