Applying online – answers to top questions

Find answers to common questions about the basics of applying such as what is a UCI number, accepted file formats, size limits, how to reduce file size, troubleshooting technical issues and more.

All online applications

ID numbers

File formats and file size limits

Combining files for upload

My documents are too large to upload. How do I reduce the file size?
I need to add more than 1 file to my online application, but there is only 1 field to upload documents. What can I do?

Reviewing answers and signing an application

Viewing messages and other actions after you submit

Downloading PDF files

Troubleshooting technical issues

General technical issues

What do I do if I have technical problems when applying online?

Maintenance downtime and unscheduled outages

What do I do if the online application system is down?

Browsers

Submitting documents on request

How to submit new documents when we request

Updating your information after you submit your application

Address and contact information

How can I change my address or contact information for my immigration or citizenship application?

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2024-07-26

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