You mean you wanted to sponsor for your mother? If so, you will need to wait until the online "express of interest" is open on the first few days of January 2019 (was on 2 January 2018). You will provide your details and when you are done with the online submission, you will get a confirmation number.
The express of interest form is available for 1 month, so it will close on 2 February 2019 (assuming it opens on 2 Jan 2019). IRCC will remove all the duplicates and will randomly select 10,000 confirmation number to invite them to send the application to sponsor for parents.
If you are selected, then you would have 60 days to prepare the application documents so you don't need to worry too much about it yet
For details information on the whole process, I recommend you to spend sometimes reading the information in this IRCC website
https://www.canada.ca/en/immigratio...sponsorship/sponsor-parents-grandparents.html