I am having trouble updating my MACOS, says I do not have latest version, but when I go to updates in App Store says there are no updates and I am having some problems. Can someone please help me resolve this?

To be clear, software update generally means to install software to update the macOS currently running on the Mac; update Catalina 10.15.1 to Catalina 10.15.7, for example.

To update your current macOS, click the Apple  icon > About This Mac and then click Software Updates.... If there are any updates available for your Mac, they will be listed and you can apply them when you like.

A software upgrade is usually a generational step up to a newer macOS; upgrade from 10.13 High Sierra to 10.14 Mojave, for example, or from 10.15 Catalina to macOS 11 Big Sur.

Do NOT upgrade until you have made a Time Machine or other backup of your startup drive.

The macOS version you can upgrade to depends on the year your Mac was released.

Click the  (Apple) menu at the top left of your screen and choose About This Mac.

macOS 10.13 High Sierra is compatible with the Macs listed here:

https://support.apple.com/kb/sp765?locale=en_US

macOS 10.14 Mojave is compatible with the Macs listed here:

https://support.apple.com/kb/SP777?locale=en_US

macOS 10.15 Catalina is compatible with the Macs listed here:

https://support.apple.com/en-us/HT210222

macOS 11 Big Sur is compatible with the Macs listed here:

https://support.apple.com/en-us/HT211238

What type of Mac do you have (iMac, MacBook Pro, MacBook Air, etc)?

What model year is it?

What OS is currently running?

All 3 of those are available at Apple menu > About This Mac.