I want to upgrade my ipad from iOS 10.3.4 to iOS 11 or 14

Hi Gabmigz, thank you for posting in Apple Support Communities.

It is exciting to be able to upgrade to the later version of IOS as they can include new enhancements and processes and fix previous IOS bugs all to make the use of our iPads more efficient and effective.

As such the process to upgrade your iPad is very detailed in the following link. 

https://support.apple.com/en-au/HT204204

Having said that, you may find your iPad is at its latest update and cannot be upgraded any further. Should this occur the only option available for you to get a later version of IOS is to upgrade your iPad. However, before progressing an iPad upgrade, please check the following link which will identify what version of IOS is applicable to your iPad https://support.apple.com/en-au/HT201222

If the issue persists and you identify that your iPad IOS can be upgraded, please contact Apple Support. You can do this as follows:

• Online:--> Genius Bar Reservation and Apple Support Options - Apple;
• Contacting a local Apple Store or AASP among the list provided above but also again as follows Apple – Location Selector; or
• Using the "Apple Support" app, available and downloadable from App Store.

Update of your iPad is not possible. If your iPad is currently running, or cannot be updated beyond iOS 10.3.3/4, then have an iPad4.

Update support for iPad4 ended September 2017. The final iOS releases for this model were iOS 10.3.3 (WiFi Only models) and iOS 10.3.4 (WiFi & Cellular). iPad4 cannot be updated to any later major version of iOS as it lacks the minimum hardware requirements needed to run more recent versions. The 32-bit platform upon which the iPad4 is based is obsolete.

Most App Developers have dropped support for 32-bit devices and iOS versions preceding iOS11/12/13 - and have withdrawn older versions of their Apps from the Apple App Store. Withdrawal of Apps supporting older models of iPad is making their utility and usefulness significantly more limited. Once compatible versions Apps are withdrawn, you’ll not be able (re)download or (re)install them.

If Apps that you need to use now have higher minimum iOS-version requirements, your only option is to replace your iPad with newer model. Of current models, even the entry-level iPad9 supports current iPadOS 15 - and has hardware specifications and capabilities that vastly outperform your old iPad4.

I hope this information is helpful - if only in clearly stating the fundamental limitations of your iPad4 and your available options.