Congratulations again on being a finalist at ISEF 2019 and hooray that you are planning your display board and presentation for ISEF 2020.
Here's a link to a page that shows the 2020 Rules and Guidelines for ISEF 2020. There is a link to the Rules and Guidelines and a second link to the Rules and Guidelines with Forms. https://www.societyforscience.org/isef/ ... nal-rules/
I'm sure you are familiar with some of these guidelines from ISEF 2019, but I encourage you to pay particular attention to the 2020 guidelines and do not assume the 2020 guidelines for any issue are the same as they were for 2019.
I see that the guidelines assume that you have an adult sponsor and that you will be working with your sponsor to go through these rules and determine which forms you will need.
The rules for continuation projects such as yours start on page 4 of the 2020 Rules and Guidelines. That page might change if you are looking at the 2020 Rules and Guidelines with Forms.
I notice that you can only show 12 months of research, but you can choose which 12 months within the time period January 2019 to May 2020. So connect with your adult sponsor and study the guidelines! Please do not hesitate to post again with more questions. Congratulations again and best of luck with your preparations!