jetoquebec said:
being single is really one big question for them so you should prove you have strong ties to return to your country
That's mostly true.
Being single (and young..... and having the BF's employer inviting for the BF's birthday.... and possibly wanting to get married during the visit..... and no previous travel history) are all red flags indicating a strong possibility to overstay the visit.
I think the visa officer will not be convinced that your BF's employer is genuinely inviting you for a visit + is prepared to host/accommodate/pay for your travel and living expenses? Why would anyone do this especially when you have no real relationship to the host?
Also why would someone who has an ailing mother/is an only child want to visit Canada? Why would someone who earns CAD 700 intend to spend a good bit of this earnings on a trip abroad?
IMO you have a low chance of getting a TRV. You can apply if you still wish to do so.
Regarding your documents:
2. Yes, please provide details of the benefits you are entitled to in your Cover Letter. This must be stated in your employment letter too.
3. Would this be paid or unpaid leave from work?
4. Do submit ITRs for the last 2 years.
5. Is all of this money your own? Can be it tracked back to your salaries? Do you have credit cards?
8. When did your mom have the heart operation? Will you hire someone to take care of her during your visit? Does she require any special care at home?
10. Day-by-day itinerary along with expense estimates.... and prove that you have the finances to pay for this visit
Host documents:
1. Do word your Invitation and Cover Letters carefully..... maintain the tourist approach + prove stronger reasons (not just employment and your mom) to return to the Philippines.
Your BF's employer can provide accommodation/living expenses.... you will pay for airfare + meals/activities/sightseeing/travel/shopping, etc etc
You can include a copy of your BF's employment letter. However, I feel the BF birthday/BF's employer inviting you will not work
Cheers