Can I can claim my medical expenses for 2018 that I was unable to claim (cause it didn't meet the standard deduction) on this year taxes ?

[retiree]

On your 2019 tax return you can claim only expenses that you actually incurred in 2019,  not 2018.  To claim any additional 2018 expenses you will have to prepare and file an amended return for 2018 using form 1040 X, which is generally not available until sometime in February of the respective tax year.

[xmasbaby0]

You can only claim medical expenses you PAID in 2019 on your 2019 tax return, regardless of when you incurred the expense.

MEDICAL EXPENSES

The medical expense deduction has to meet a rather large threshold before it can affect your return. The amount of medical (including dental, vision, etc.)  expenses that will count toward itemization is the amount that is OVER 7.5% of your adjusted gross income. You should only enter the amount that you paid in 2019—do not include any amounts that were covered by insurance or that are still outstanding. Of course, your medical expenses plus your other itemized deductions still have to exceed your standard deduction before you will see a difference in your tax due or refund.

To enter your medical expenses go to Federal>Deductions and Credits>Medical>Medical Expenses